/Engine/Source/Runtime/MeshDescription/Public/MeshDescription.h
Returns the edge ID defined by the two given vertex instance IDs, if there is one; otherwise INDEX_NONE
[FEdgeID](API\Runtime\MeshDescription\FEdgeID) GetVertexInstancePairEdge ( const [FVertexInstanceID](API\Runtime\MeshDescription\FVertexInstanceID) VertexInstanceID0, const [FVertexInstanceID](API\Runtime\MeshDescription\FVertexInstanceID) VertexInstanceID1 ) const